Medicine & Health
What is The circulatory system?
The circulatory system is the body's transport network — the heart, blood, and blood vessels — that carries oxygen, nutrients, and waste around the body. The heart pumps blood through arteries, capillaries, and veins in a continuous loop.
See it, don’t just read it.
Watch a 2-minute lesson with voice + animation that explains the circulatory system.
Key things to understand
- 1The heart pumps blood through a network of vessels.
- 2Arteries carry blood away from the heart; veins return it.
- 3Tiny capillaries exchange oxygen, nutrients, and waste with cells.
- 4It delivers oxygen and removes carbon dioxide continuously.
Frequently asked questions
- What does the circulatory system do?
- It transports oxygen, nutrients, hormones, and waste throughout the body via blood.
- What are arteries, veins, and capillaries?
- Arteries carry blood from the heart, veins return it, and capillaries exchange materials with cells.
- How is it linked to the lungs?
- Blood picks up oxygen in the lungs and drops off carbon dioxide, then circulates the oxygen to the body.